A Northwest Side man has been charged with sexually assaulting a woman at knifepoint in the Albany Park area late Wednesday — just blocks from where he is alleged to have committed two robberies last summer, authorities said.

Rolando Cortes, 20, sexually assaulted a 22-year-old woman at knifepoint about 11:30 p.m. Wednesday in the 4300 block of West Lawrence Avenue, according to the Chicago Police Department Office of News Affairs. Cortes, who had been free on bond in two robbery cases from last summer and who lives in the 4700 block of North Kasson Avenue, blocks from where all the crimes took place, was ordered held without bail in a hearing today before Criminal Court Judge Adam Bourgeois Jr.

The woman was walking home from a gym when Cortez grabbed her, pulled her into an alley and assaulted her, then assaulted her again in the courtyard of a nearby church, prosecutors said.

Cortes told the woman he was "going to jail in a few weeks" and that's "why he was doing this," according to prosecutors.

Before he let the woman go, Cortes made her give him her phone number, and he later called her while she was at a police station talking to police about the assaults, prosecutors said.

At the time of the attack, Cortes was free on bail in two felony criminal cases. One was a robbery, aggravated battery and unlawful restraint case from about 10 p.m. July 10 in the 4600 block of North Lowell Ave., according to police and court records. The other was in a robbery and unlawful restraint case from about 12:35 a.m. June 9 in the 4700 block of North Elston Avenue.

In denying Cortes bail, Bourgeois said, "There is no condition (of bond) I can set to keep the public safe from you."